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<p>X-rays, characterized by their short wavelength and high penetrating power, are indispensable across numerous fields. Current X-ray detection relies heavily on amorphous selenium (a-Se) and medium bandgap semiconductors (e.g., Si, CdTe, CZT), which often face limitations including complex large-scale fabrication, high cost, and stability issues under intense irradiation. While alternative wide-bandgap materials like diamond offer excellent performance, challenges related to scalable fabrication and cost often remain. Here, we report a high-performance X-ray detector based on solution-processed quasi-two-dimensional (2D) gallium oxide (Ga₂O₃) films fabricated via a novel liquid metal nano-printing technique. Leveraging the ultra-wide bandgap and high quality of the printed Ga₂O₃, the device achieves an ultra-high sensitivity of 6050 μC/Gy/cm². We further demonstrate the practical utility of these detectors by integrating them into a functional X-ray imaging system. This work establishes liquid metal nano-printing as a vital pathway for the rapid fabrication of ultrathin, high-performance, low-power-consumption X-ray detectors. Additionally, this work enables low-dose, high-resolution X-ray imaging for medical diagnostics and non-destructive testing, demonstrating a cost-effective pathway toward portable radiation detection systems.</p>

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Quasi-2D gallium oxide X-ray detector

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月29日

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  • Ruo-fan Li,
  • Chen Hua,
  • Xue-qing Chen,
  • Zhong-shan Deng,
  • Ming-hui Guo,
  • Qian Li,
  • Jing Liu

摘要

X-rays, characterized by their short wavelength and high penetrating power, are indispensable across numerous fields. Current X-ray detection relies heavily on amorphous selenium (a-Se) and medium bandgap semiconductors (e.g., Si, CdTe, CZT), which often face limitations including complex large-scale fabrication, high cost, and stability issues under intense irradiation. While alternative wide-bandgap materials like diamond offer excellent performance, challenges related to scalable fabrication and cost often remain. Here, we report a high-performance X-ray detector based on solution-processed quasi-two-dimensional (2D) gallium oxide (Ga₂O₃) films fabricated via a novel liquid metal nano-printing technique. Leveraging the ultra-wide bandgap and high quality of the printed Ga₂O₃, the device achieves an ultra-high sensitivity of 6050 μC/Gy/cm². We further demonstrate the practical utility of these detectors by integrating them into a functional X-ray imaging system. This work establishes liquid metal nano-printing as a vital pathway for the rapid fabrication of ultrathin, high-performance, low-power-consumption X-ray detectors. Additionally, this work enables low-dose, high-resolution X-ray imaging for medical diagnostics and non-destructive testing, demonstrating a cost-effective pathway toward portable radiation detection systems.